Thermal Carbon Black uses natural gas, coke oven gas or heavy liquid hydrocarbons as raw materials, and generates carbon black through high temperature pyrolysis in the absence of oxygen and flames, which is called thermal carbon black, also known as Thermal black.
Thermal cracking carbon black production process
The pyrolysis method uses natural gas, coke oven gas or heavy liquid hydrocarbons as raw materials, and adopts a batch production process with two production furnaces as a group. The production process and heating process are alternately carried out in the production furnace, and continuous production is possible.
In the preheated reaction furnace, the air is isolated, and the method of intermittent (two stages of combustion heat storage and thermal decomposition) or continuous (single thermal decomposition) pyrolysis to generate carbon black is carried out. This carbon black produced by cracking is called thermal black.
Performance characteristics of thermal carbon black
Pyrolytic carbon black has the lowest specific surface area among carbon black varieties, basically exists as a single spherical particle, does not sinter or coalesce into aggregates, and its surface oxygen content is very small (0.1%-0.3%).
The carbon black produced by pyrolysis has the characteristics of high purity, less hard carbon, low ash content and low sulfur content. Thermal cracking carbon black also has special performance, low structure and smooth surface, which makes it superior to natural gas semi-reinforced carbon black in terms of processability, filling, resilience and electrical resistance.
Classification of thermal pigment carbon black and range value of nitrogen adsorption specific surface area
Thermal carbon black powder mainly has three varieties: medium thermal black, non-polluting medium thermal black and fine thermal cracking black. The nitrogen adsorption specific surface area of medium thermal cracking carbon black is 6-10㎡/g, and the nitrogen adsorption specific surface area of fine thermal cracking carbon black is 10-15㎡/g.
Uses of Thermal black
In addition to the traditional use, thermal cracking carbon black is opening up new application fields. In addition to being used as a filler in the rubber industry, Thermal Pigment Carbon Black is also widely used in wires, cables, plastics, refractory materials, metallurgy, video tapes, etc. industry.
In the metallurgical industry, thermal cracking carbon black is required for the production of chromium, solar silicon, titanium, vanadium, tantalum and tungsten carbide.